Nu-Way NOL100-38, Installation & Maintenance Manual, Page: 10 / 24

NOL 18-100 HL Page 10
O
PERATION
At commencement of the firing cycle, there is a pre-
purge with forced air and ignition.
After a time delay, the low flame magnetic valve is
energised and allows oil to flow to the low flame
nozzle and the burner lights on low flame.
After a further delay the high flame magnetic valve
is energised, allowing oil to flow to the high flame
nozzle and operate the air damper to the high
flame position. During the running cycle the high
flame magnetic valve is energised via the high/low
controlling instrument, but is always de-energised
at each burner start, thus giving a low flame light
up.
On reaching operating temperature the controlling
thermostat will open and the sequence controller
will shut-off the motor and close magnetic valves.
A limit instrument (hand reset) is also normally
fitted to the appliance.
C
OMMISSIONING
I
MPORTANT
- S
AFETY
It is essential that commissioning shall be
undertaken only by suitably qualified and
experienced personnel. In the case of NOL
burners, commissioning engineers should be
experienced in pressure jet oil burner
commissioning. Nu-way can accept no
responsibility for consequential loss, damage or
personal injury which results from a failure to follow
the commissioning instructions provided or from
commissioning procedures being undertaken by
unqualified personnel.
E
MERGENCY
I
NSTRUCTIONS
NOL burners are designed and constructed to meet
current legislation. When used in accordance with
the instructions provided, NOL burners are unlikely
to produce a hazardous condition. If, however
such a condition should arise in connection with
the burner, the appliance or of any instrument,
machine or service in the vicinity of the burner, the
OIL AND ELECTRICITY SUPPLIES SHALL BE
ISOLATED IMMEDIATELY and they shall remain
isolated until the fault has been identified and
rectified.
Inspection
Before commissioning is begun it is important to:
•
Check that the electrical wiring is complete
and complies with all applicable Codes and
Standards.
•
Ensure that the fuses are fitted and are of the
correct rating.
•
Check electrical earthing.
•
Verify that the oil supply system is correctly
designed and that the supply pipework is
correctly sized and free from leaks.
•
Ensure that all manual fuel isolation valves
are operable, fully closed and leak tight.
•
Make all personnel involved in the
commissioning aware of the location of the
emergency fuel and electricity isolation
points.
•
Establish that the appliance is in an
appropriate and safe condition to be fired;
for example, that there is water in the boiler.
•
Set the appliance controls to call for heat.
•
Check the appliance ventilation and flueing
arrangements.
•
Ensure that any warning notices appropriate
to the commissioning procedure are in
position.
•
Ensure that all necessary tools and test
equipment are available and ready for use.
Essential items include temperature
measuring instruments for measuring flue gas
and appliance water temperatures, and a
means of analysing the flue products for
carbon dioxide (CO
2
), oxygen (O
2
), carbon
monoxide (CO) and smoke.
•
Check that all relevant documentation is
available including, where appropriate:
•
The agreed plant performance
specifications.
•
Plant drawings and pipework layouts.
•
Electrical logic and wiring diagrams.
•
Certificates confirming satisfactory
completion of procedures such as
soundness testing and electrical safety
tests.
•
Commissioning, operating and
maintenance instructions for the plant.